﻿/**
 * Copyright (C) 2011 original author and authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NGuice.Inject.Spi;
using System.Collections.ObjectModel;
using NGuice.Inject.Internal.Util;
using NGuice.Inject.Internal;

namespace NGuice.Inject
{
    /// <summary>
    /// 提供一个实例时发生的异常
    /// </summary>
    [Serializable]
    public sealed class ProvisionException : NGuiceException
    {
        private ICollection<Message> messages;

        /** Creates a ConfigurationException containing {@code messages}. */
        public ProvisionException(IEnumerable<Message> messages)
        {
            InitMessage(messages);
            InitCause(Errors.GetOnlyCause(this.messages));
        }

        private void InitMessage(IEnumerable<Message> messages)
        {
            Preconditions.CheckNotNull(messages);
            Preconditions.CheckArgument(messages.Count() != 0);
            this.messages = new ReadOnlyCollection<Message>(messages.ToList());
        }


        public ProvisionException(string message, Exception cause)
            : base(cause)
        {
            InitMessage(new Message[] { new Message(new List<object>(), message, cause) }.AsEnumerable());
        }

        public ProvisionException(string message)
        {
            this.messages = new ReadOnlyCollection<Message>(new Message[] { new Message(message) }.ToList());
        }

        public ICollection<Message> ErrorMessages
        {
            get
            {
                return messages;
            }
        }

        public override string Message
        {
            get
            {
                return Errors.Format("NGuice provision errors", messages);
            }
        }

    }
}
